Amazing & Interesting: Save time on Battery Changing & Winding, indicate time till 2100, Perpetual! Another innovation by the Japanese Giant, SEIKO. Just like self-winding mechanical watch, it uses movement of the user's hand. Well, It goes a step further by converting human kinetic energy into electrical energy to work the watch Without a Battery! Macho looking with Rose Gold, trust is Tone, for the Markers & Crown. Stainless steel case & bracelet. Rather shallow at 100m water resistant. Will give it a serious look.